CVE-2026-70776: Oracle Hyperion Auth Bypass Vulnerability

CVE-2026-70776 Overview

CVE-2026-70776 is a vulnerability in the Oracle Hyperion Financial Reporting product of Oracle Hyperion, specifically affecting the Server component. The supported version affected is 11.2.25.0.000. A low-privileged attacker with network access via HTTP can exploit this flaw, though successful exploitation requires user interaction from a person other than the attacker. Successful attacks allow unauthorized update, insert, or delete access to some Oracle Hyperion Financial Reporting accessible data.

Critical Impact
Successful exploitation permits unauthorized modification of a subset of data within Oracle Hyperion Financial Reporting, affecting the integrity of financial reporting information.

Affected Products

Oracle Hyperion Financial Reporting 11.2.25.0.000
Oracle Hyperion (Server component)

Discovery Timeline

2026-08-18 - CVE-2026-70776 published to the National Vulnerability Database (NVD)
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-70776

Vulnerability Analysis

The vulnerability resides in the Server component of Oracle Hyperion Financial Reporting. An authenticated attacker with low privileges can send crafted HTTP requests to the server to alter data accessible to the application. Exploitation is described as difficult and requires user interaction, meaning a victim other than the attacker must perform an action such as clicking a link or loading a resource.

The impact is limited to integrity. There is no direct impact to confidentiality or availability. The vulnerability enables partial unauthorized modification of data, meaning an attacker can update, insert, or delete some records but cannot broadly compromise the underlying system.

Root Cause

Oracle has not published detailed root-cause information for CVE-2026-70776. Based on the CVSS metrics, the flaw involves an HTTP-facing server endpoint that can be induced to perform integrity-affecting actions through user interaction. Refer to the Oracle Security Alert for vendor-provided detail.

Attack Vector

The attack path is network-based over HTTP. An attacker with valid low-privileged credentials crafts a malicious request or link and induces a second authenticated user to trigger the action. Because the scope is unchanged and no privileged access is required from the attacker, the exploitation prerequisites are narrow but plausible in shared enterprise reporting environments.

No public proof-of-concept code has been released, and no verified exploit is currently available. The Exploit Prediction Scoring System (EPSS) probability is 0.193%, placing this CVE in the 9.396 percentile for near-term exploitation likelihood.

Detection Methods for CVE-2026-70776

Indicators of Compromise

Unexpected update, insert, or delete operations against Oracle Hyperion Financial Reporting data outside of normal user workflows.
HTTP requests to Hyperion Financial Reporting server endpoints originating from low-privileged accounts followed by interactive session activity from a second user.
Anomalous report modifications or record changes performed shortly after users click links from untrusted sources.

Detection Strategies

Enable Hyperion audit logging for data modification actions and forward events to a centralized SIEM for correlation.
Correlate authentication logs with data-modification events to identify low-privileged users triggering unexpected write operations.
Baseline normal Financial Reporting HTTP traffic patterns and alert on deviations tied to specific low-privileged accounts.

Monitoring Recommendations

Monitor Oracle Hyperion Financial Reporting server logs for unusual request patterns from authenticated low-privileged users.
Track user-interaction-driven workflows that result in data modification, including Referer and session context.
Alert on modifications to financial records performed outside documented change windows.

How to Mitigate CVE-2026-70776

Immediate Actions Required

Apply the security update referenced in the Oracle Security Alert for August 2026.
Inventory all Oracle Hyperion Financial Reporting deployments and confirm whether version 11.2.25.0.000 is in use.
Restrict network access to Hyperion Financial Reporting servers to trusted internal segments only.
Review low-privileged account assignments and enforce least privilege on Hyperion roles.

Patch Information

Oracle has addressed CVE-2026-70776 as part of the August 2026 Critical Patch Update. Refer to the Oracle Security Alert for the applicable patch and installation instructions for Oracle Hyperion Financial Reporting 11.2.25.0.000.

Workarounds

Where patching cannot be performed immediately, restrict HTTP access to Hyperion Financial Reporting to authenticated administrative networks.
Train users to avoid interacting with unsolicited links or embedded content that references internal Hyperion URLs.
Enforce short session timeouts for low-privileged Hyperion accounts to reduce the window for user-interaction-based exploitation.

bash

# Example: restrict access to Hyperion Financial Reporting HTTP endpoints
# using host-based firewall rules (illustrative only)
iptables -A INPUT -p tcp --dport 19000 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 19000 -j DROP